# Let f(x) = x^2 - 3x - 7 how do you find f(-3)?

$\Rightarrow f \left(\textcolor{red}{- 3}\right) = {\left(\textcolor{red}{- 3}\right)}^{2} - 3 \left(\textcolor{red}{- 3}\right) - 7$
$= 9 + 9 - 7 = 11$